New Delhi [India], Jan. 25 (ANI): The Delhi High Court on Wednesday deferred the hearing of the Central Bureau of Investigation's (CBI) plea challenging the bail of former air chief S.P. Tyagi and others in Augusta Westland case till February 1. The High Court had earlier on January 18 deferred the hearing on the same till January 25. A CBI special court had earlier on January 4 granted bail to the former air chief's cousin Sanjeev Tyagi and his lawyer Gautam Khaitan in this case. The court had then directed Sanjeev and Khaitan not to contact any witnesses and not to leave the National Capital Region (NCR) without prior permission. The court had earlier granted bail to the 72-year-old former air chief, saying that CBI has failed to state the alleged bribe amount and when it was paid. The former air chief, who retired in 2007, his cousin Sanjeev and Khaitan were arrested on December 9, 2016, by the CBI in connection with the case which relates to procurement of 12 VVIP choppers from UK-based firm during the UPA-2 regime. (ANI)